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Thought I would post this on the help list before reporting this as a bug.

I'm writing an integration package which calculates N dimensional
integrals on infinite intervals using the GSL Monte Carlo functions. I'm
using tan(pi/2 x) to transform the integral to the (0,1) domain. For
different functions, I've seen negative values for the chi/dof values.
This is a reproducer integrating a gaussian on (0,+inf) that follows the
sample code found in the GSL manual where I've seen this problem on both a
Mac ( 10.4.11, Intel ) and a Linux machine (AMD Operton 86x_64). Although
the values differ on the two machines, at least 2-3 calls in the loop will
return a negative value for chi/dof.

I searched through the bug list archives and I didn't see this reported.
Is this a bug or am I doing something wrong here?